This article helps device driver developers test the interrupt service routine as much as possible by simulating the various interrupts.

本文通过模拟各种中断，尽可能地帮助设备驱动程序开发人员测试中断服务例程。

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By default, the driver IRQ routine should return IRQ_HANDLED as it is a bug to return IRQ_NONE when the driver has actually handled that interrupt.

缺省情况下，驱动程序IR Q例程应该返回IRQ_HANDLED，当驱动程序正在处理那个中断时却返回了IRQ_NONE，说明存在bug。

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That routine is initialized by the device driver associated with the device.

那个程序被与设备有关的设备驱动设定初值。

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En route, my taxi driver explained the routine.

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